Nuclear Chemistry III. Fission & Fusion.

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Presentation transcript:

Nuclear Chemistry III. Fission & Fusion

A. F ission splitting a nucleus into two or more smaller nuclei 1 g of 235U = 3 tons of coal

A. F ission chain reaction - self-propagating reaction critical mass - mass required to sustain a chain reaction

B. Fusion combining of two nuclei to form one nucleus of larger mass thermonuclear reaction – requires temp of 40,000,000 K to sustain 1 g of fusion fuel = 20 tons of coal occurs naturally in stars C. Johannesson

C. Fission vs. Fusion 235U is limited fuel is abundant danger of meltdown toxic waste thermal pollution fuel is abundant no danger of meltdown no toxic waste not yet sustainable

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